<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<script type="text/javascript">
			var str = "abcdea";
			
			//给字符查索引（索引值为0，说明字符串以查询的参数为开头）
			console.log(str.indexOf("c"));
			console.log(str.lastIndexOf("c"));
			
			console.log(str.indexOf("a"));
			console.log(str.lastIndexOf("a"));
			
			//了解：数据传递的时候经常需要通过编码后再传递,接收后还需要反编译回来.
			var url = "http://www.itcast.cn?username='aaa'&password='123'";
			console.log(encodeURIComponent(url));
			console.log(decodeURIComponent(encodeURIComponent(url)));
		</script>
	</body>
</html>
